<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .boxa{
            background-color: red;
            width: 290px;
            height: 250px;
            margin: auto;
        }
       .main{
           height: 250px;
           width: 290px;
           background-color: aqua;
           list-style-type: none;
           position: relative;
           padding: 0px;
           
       }
       .main li{
           background-color: antiquewhite;
           width: 103px;
           height: 103px;
           position: absolute;
           /* left: 0px; */
           bottom:80px;
       }
       .main li:last-child{
           right: 0px;
           /* right: 0px; */
           background-color: black;
       }
       .main li:nth-child(2){
           left: 80px;
           width: 130px;
           height: 130px;
           background-color: blue;
       }

    </style>
</head>
<body>
    
    <div class="boxa">
        <ul class="main">
            <li></li>
            <li></li>
            <li></li>
        </ul>
    </div>
</body>
</html>